This family includes plant antimicrobial peptides [1-2]. They adopt an alpha-helical hairpin fold stabilised by two disulphide bonds [2].

1: Purification and characterization of a novel antimicrobial peptide from maize (Zea mays L.) kernels. Duvick JP, Rood T, Rao AG, Marshak DR; J Biol Chem. 1992;267:18814-18820. PMID:1527010

2: Disulfide-stabilized helical hairpin structure and activity of a novel antifungal peptide EcAMP1 from seeds of barnyard grass (Echinochloa crus-galli). Nolde SB, Vassilevski AA, Rogozhin EA, Barinov NA, Balashova TA, Samsonova OV, Baranov YV, Feofanov AV, Egorov TA, Arseniev AS, Grishin EV; J Biol Chem. 2011;286:25145-25153. PMID:21561864